27398721

素因数分解:

$3^1\times 7^1\times {\mathrm{53}}^1\times {\mathrm{103}}^1\times {\mathrm{239}}^1$

素因数の和:405

約数の個数: 32

約数和(自身を含む): 43130880

約数和(自身を除く): 15732159

約数列:

[1, 3, 7, 21, 53, 103, 159, 239, 309, 371, 717, 721, 1113, 1673, 2163, 5019, 5459, 12667, 16377, 24617, 38001, 38213, 73851, 88669, 114639, 172319, 266007, 516957, 1304701, 3914103, 9132907, 27398721]

約数ペア:

[(1, 27398721), (3, 9132907), (7, 3914103), (21, 1304701), (53, 516957), (103, 266007), (159, 172319), (239, 114639), (309, 88669), (371, 73851), (717, 38213), (721, 38001), (1113, 24617), (1673, 16377), (2163, 12667), (5019, 5459)]